Driving mechanism for mixing machines



C. C. G'ULDBECH.

DRIVING MECHANISM FOR MIXING. MACHINES. APPLICATION FILED IAN.3I, 192|.

Ll. Patented Img, 2l 1922.

2 SHEETS-SHEET l.

C. C. GULDBECH..

DRIVING MECHANISM FORMIXING MACHINES.

APPLICATION FILED IAN.3 I. 192|.

AZS@ Patented Allg- 22., R922.

2 SHEETS-SHEET 2.

-'" 5' I I I m26 721- a 27 5 l@ Z7 I :Z9 Za f7@ I 5a 76L I zsa 27 I l lf 25mm IIIIIKIIIIIIIII IIIIIIIIIII 26 IIIIIIIIIIIIIIIIIIII J 15b i! 50rnnren'srares CARL C. G-''LDBECH,4 0F BEACON, -NEW YORK.

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,a i .Specification of Letters Patent. l'Il gat;@entreall Auw 22,'T922.,

Application led January- 31,1921. Serial No. dl. l

To all whom it mag/concern -Be it known that l, CARL C. G-ULDBECH, a

' citizen of the United States, and a resident .'countershaft,heretofore of Beacon, Dutchess County, New York, have invented certainnew and useful lmprovements in Drivin Mechanism for Mixing Machines, ofwhich the following is a specification. Y

While. my invention relates to improved means for driving mixingelements generally, it has been -applied more specifically1 inconnection with the driving of mixing or beating arms or blades of doughmixersemployed in bakeries. @ne object of my in'- vention is to providea special arrangement of driving'means whereby the mixing blades may bedriven at both ends of the machine; the means employed at one end beingentirely dissociated from the means employed at the opposite end. l

A further object' of my invention is to so arrange such drivingmechanism that l may employ independent motors for driving a pair ofbladed shafts, through the medium of suitable gearing directly connectedbetween the shaft or shafts carrying the mixing arms or blades and themotor shaft; which gearing may comprise a worm and worm wheel as theonly gearing employed; thereby avoiding the necessity Vof using aemployed, for transmittingto the opposite end lof a mixing machine powerapplied at one end of the same.

These and other features of my invention are more fully ldescribedhereinafter, reference being had to the accompanying Figure 1, is alongitudinal sectional View of one form of mixing machine and drivingmeans therefor, within the scope of my invention.

Fig. 2, is an end elevation of the same.

Fig.` 3, is a view similar to Fig. l, showing a modified arrangement ofthe driving mechanism. l

Figure d, is a plan view of another form of mixing machine Aand drivingmechanism therefor within the scope of my invention;

Figure 5, is an end' elevation of the structure shown in Figure 4;

Figure 6,' is a view, similar to. Figure 4, showing a bowl with anotherform of mixing mechanism with driving means therefor within the scope ofmy invention; and

Figure 7, is an end elevation of the same.

As may be readily understood, various arrangements of the'dr-ivingmotors may .be emplofyed, -and amon the arrangements illustrated in thedrawings l have shown a mixing machine having apair of mixing blades orarms arranged to rotate about a common axis; the inner mixing bladebeing provided with solid shaft ends or trunnions fitting within sleeveshafts or trunnions carried by the outer mixing blades, and each of saidmixing" blades or arms carrying a worm-wheel which is arranged to meshwith a worm on a motor shaft; the worm-wheel4 at one end of the machinebeing attached to a solid shaft end or trunnion of the inner mixingblade, While the worm-wheel at the opposite end of the machine may beattached to one ofthe sleeve shafts or trunnions of the outer mixingblade.

lin lieu of employing worm and wormwheels, the motor shafts may carrypinions 'arranged to mesh with spur Wheels carried by the respectiveshafts or trunnions; the motors being set in positions substantially atright angles to the position they occupy when worm gearing is employed.As' may be further understood, the motors may be arranged to turn themixing blades in the same direction or inopposite directions, and thespeed of one maybe altered with respect to the speed of the other so asto effeet any result sought to'be obtained in the mixing of materialunder treatment. lf desired, the motors may be of di'erent capacity.

lin another arrangement, l may provide two sets of mixing arms or bladescarried by shafts mounted upon independent axes; the same beinggeared'together' and the caring at each end. of the machine being drlvenby an independent motor.

but it will be understood, of course, that while the movement of onesetf of mixing blades or arms ma be at the same speed or ata di'erentspee with respect to the other,

.shaft adapted to bearings at opposite ends of the mixing bowl; each endof sgid shaft 'llhese mlxing blades may be drlven 1n elther direction asdesired,

sav

carrying a worm wheel meshing with a worm driven by an independentmotor. ln

thev arrangement just described, it will beI chine in the mannerdescribed, the torque isl edected gradually and `in thesame ratio ateach end of the machine; thereby avoiding .the twisting strain commonlyoccurring when power is applied at one endonly of a shaft. Av furtheradvantage .is the great leverageobtained by the employment of a worm asthe transmitting medium and when employed such worm is preferablyprovided with multiple threads in order to increase the speedtransmitted to the worm wheel.

A stillfurther advantage lies in the fact that the motor being a 'freelyrotatable ele-I mentin a magnetic field, it may be halted temporarilyunder the severe strainof heavy dutyv without breaking or. dislocatingthe power transmittitng elements.

ln the form of structure illustrated in Figs. 1 and 2, 1- represents asuitable -mix- `ing bowl of any desired'typ'e, within which may bedisposed, as illustrated in the preslent-instance, two sets of mixingblades or arms '2 and 3; the mixing blades 2, inthe present arrangement,bein arranged to rotate on the same axis as t e .mixing blades 3, and.`being disposed within the same. rlhe mixing blades or arms 2 may becarriedby suitable end barsal, having projectingmembers 5, constitutingtrunnions adapted Ato suitable bearings. The mixing blades or arms 3 maybe carried by end bars 6, having hollow trunnions 7; the trunnions 5being disposed within the hollow trunnions 7 and thelatter beingadapted' to suitable bearings 8 in end supports or standards y9;

v At one end of the mixing bowl a wormwheel 10.is attached to one ofthesolid trunmons 5, and at the opposite endl of the bowl a worm-wheel 11,similar in size to the wheel 1Q, may be attached to one y of the hollow.trh'nnions 7. Suitably journaled in bearings 112, whichl may be carriedbythe endstandards 9, are shafts 13 and la, carrying worms 15 and16,having multiple threads,

three or' tour, as the case may be, which A mesh with the. wormwheels10` and .11, and

theseshatts 13: and Mare operatively con- .nected with motors' 17 and 18whereb' said worms 15 'and 16 may be directly riven thereby and imparttheir movement tothe .worm wheels 10 and 11 v :tor transmission to -themg bladesor arms 2 and 3.

ln the form ci 'structure illustrated in Figs. 1 and 2, li preferably.provide motors inattesa direction, or said blades or arms may move inopposite directions, in which case the mo- `tors will be moving in thesame direction.

In lieu of changing theV direction of movement of the motor armatures,lmay emv ploy any suitable `form of reversible clutches between saidmotors and shafts; such clutches being diagrammatically illustrated at.19, and these shafts 13 and 14; mayalso be provided with suitablecouplings, indil cated at 20.

In the structure shown in Fig. 3, whichmay be of the same type asthatshown in Figs. 1 and 2, I have shown the use of spur gearing betweenthe motors and the shafts carrying the mixing blades or arms; saidshafts or trunnions 5 and 7, respectively, being provided with spurwheels 21 and 22,V meshing with driving pinions 23 and '24 carried bymotor shafts 13a and 14, driven by motors 17a and 18%, which may dili'erin size; the structure in other respects being vsubstantially similar tothat shown in Figs. 1 and 2.

ln the form of structure shown in Figures 4c and 5, two sets .of mixingblades or arms 2? and 3a are shown, which may be carried by independentshafts 5a and 7a, suitably journaled in the end walls ot the mixing bowland being disposed in lthesame horizontal plane. ln the presentinstance, the bowl 1 is shown as equlpped with double andsingle mixingblades; the latter a", being arranged to be driven .at aspeed twice thatof thedouble mixingblade l2El and beingso setthat the single blade willproperly pass the arms of the double blade during their. rotation. Theshafts .aand 7a, carrying these mixingblades have gear wheels 2 5 and26,'` at the respective ends of the structure.

on short shafts `28, journaled insuitable bearings 29, carried by endsupports 9b such shafts 28 also serving'v as .the pivots upon which thebowl may be turned-when it is de'- sired to dump the contents of thesame.`

rllhese shafts 28 also carry worm-shafts 30, 120

towhich power may be applied by worms 15b and 16h, mounted on-shafts,13b andla",

driven' by'motors 17b and 181". .ln this ar- .I

rangement, the motors .maybe of the .same

size. As may be readily understood, the m0.- 125' tors for driving themixing elements in thisterm ofstructure may be arranged in the' mannerillustrated in'lFigure 3, and the- .power applied by spur gearing, asindicated l' there In.

These drivingl pinions 27 may be mounted t .I llligures 6 and 7., ll'have show@ a tornarse ineens@- v @L of structure in which two sets ofdouble mixing elementsmay be employed, each of which may comprise pairsof arms or blades 2c and 8, carried by end bars 4 and 6, mounted onindependent shafts 5c and 7C. These shafts carry Worm wheels 10c and 11cat their respective ends, and the wormwheels may be driven by right andleft hand worms 15c and l5Cc driven by motors 17 and 18. ln thisarrangement l may provide the shafts 5c and 7c carrying the worm-wheelswith couplings 3l and 82, so 'thatJ these shafts may be disconnectedwhen it is. de=

.sired to dump the mixing bowl; the latter' carrying short shafts ortrunnions 33 at its ends, which may be journaled at Bt in the endsupports 9, and upon which the `bowl may be turned to dump its contentswhen said shafts 5c and 7 are disconnected at their respectivecouplings; y

lt will also be understood that the types of mixing machines illustratedin Figures 4l, 5, 6 and 7, in which pairs of motors, one at each end 0f:the machine, are employed as the driving means for pairs of shafts, mayhave the motion of the latter transmitted through the 'medium of spurgearing in a manner substantially like that'illustrated in Figure l 3;necessary changes being made to operatively connect the mixing elementsand the motors through such form of gearing.

l claim:

l. 'lihe combination, with the bowl of a mixing machine, of a pair ofbladed mixing elements disposed withinsaid bowl and rotatable about acommon axis, rotatably driven supports for said mixing elements, a motordisposed at one end of the machine for driving one of' said mixingelements, gearing interposed between said motor and the rotatablesupport for said mixing yelement, a motor disposed at the opposite 'endof the machine for driving the other mixing element, and gearinginterposed between said motor` and the support ofsaid second mixingelement.

2. The combination, with the bowl ofk a mixing machine,ofapair ofbladedmixing elements disposed Within said bowl and rotatable about a commonaxis, rotatably driven supports or shafts for said mixing elements, amotor disposed at one end of the machine for driving one of said mixingelements, Worm gearing interposed between said .motor and the rotatablesupport or shaft for said mixing element, a motor disposed at theopposite end of the machine for driving the other mixing element, and iworm gearing interposed between said motor and the shaft or-support ofsaid second mixing element. y n

3. The combination, in a mixing machine, of a mixing bowl, a pair ofbladed mixing elements disposed therein and rotatable y about a commonaxis, rotatably driven shafts or supports for said mixing elements,

for driving one of said mixing elements, and a motor at the opposite endof the machine for driving the other mixing element; said motors beingdirectly geared to the shafts or supports of said mixing elements.

a. The combination, in a mixing machine, of a mixing bowl, a pair ofbladed mixing elements disposed therein, shafts for said mixingelements, a motor disposed at one end of the machine, gearing interposedbe` a motor disposed at one end of the machine bowl, independent motorsat opposite ends of said machine, and worm gearing operatively connectedbetween said motors and shafts for transmitting movement of the formerto the latter.

6. rllhe combination, in a mixing machine,

of a mixing bowl, a pair of mixing elements disposed therein androtatable about a com? mon axis, a motor disposed at one end of themachine for driving one of said mixing ele= ments, a motor disposedatthe opposite lend of'the machine for driving the other mixing element,and worm gearing for transmitting the movement of said motors to saidmixing elements; the worm elements of said gearing having multiplethreads. p

n witness whereof .l have signed this specification.v

cant c. ennnnncii.

